Index: trunk/src/board.c
===================================================================
--- trunk/src/board.c	(revision 23170)
+++ trunk/src/board.c	(revision 23171)
@@ -59,8 +59,10 @@
 
 	/* release font symbols */
 	pcb_fontkit_free(&pcb->fontkit);
-	for (i = 0; i < PCB_NUM_NETLISTS; i++)
+	for (i = 0; i < PCB_NUM_NETLISTS; i++) {
 		pcb_lib_free(&(pcb->NetlistLib[i]));
+		pcb_netlist_uninit(&(pcb->netlist[i]));
+	}
 	vtroutestyle_uninit(&pcb->RouteStyle);
 	pcb_attribute_free(&pcb->Attributes);
 
@@ -74,11 +76,15 @@
 pcb_board_t *pcb_board_new_(pcb_bool SetDefaultNames)
 {
 	pcb_board_t *ptr;
+	int i;
 
 	/* allocate memory, switch all layers on and copy resources */
 	ptr = calloc(1, sizeof(pcb_board_t));
 	ptr->Data = pcb_buffer_new(ptr);
 
+	for(i = 0; i < PCB_NUM_NETLISTS; i++)
+		pcb_netlist_init(&(ptr->netlist[i]));
+
 	conf_set(CFR_INTERNAL, "design/poly_isle_area", -1, "200000000", POL_OVERWRITE);
 
 	ptr->RatDraw = pcb_false;
Index: trunk/src/file_act.c
===================================================================
--- trunk/src/file_act.c	(revision 23170)
+++ trunk/src/file_act.c	(revision 23171)
@@ -95,8 +95,10 @@
 			PCB->Netlistname = pcb_strdup_strip_wspace(name);
 			{
 				int i;
-				for (i = 0; i < PCB_NUM_NETLISTS; i++)
+				for (i = 0; i < PCB_NUM_NETLISTS; i++) {
 					pcb_lib_free(&(PCB->NetlistLib[i]));
+					pcb_netlist_uninit(&(PCB->netlist[i]));
+				}
 			}
 			if (!pcb_import_netlist(PCB->Netlistname))
 				pcb_netlist_changed(1);